The term "wasting away" typically refers to the process of becoming weaker or smaller due to neglect, disease or lack of nutrition. There are several antonyms that convey the opposite meaning of this term, such as thriving, flourishing, prospering, and thriving. Thriving refers to being in a state of growth, health, and success. Flourishing suggests thriving in a positive environment that supports development and prosperity. Prosperity refers to the state of being successful, wealthy and affluent. Growing can also be used as an antonym, which conveys the idea of developing or expanding positively over time. Overall, these antonyms represent the opposite of the negative connotations of "wasting away" and reflect growth, progress and success.